Exhibit 10.1
                                                                    ------------


And When Recorded Return to:
Peggy J. Jones, CLAS
Weil Gotshal & Manges LLP
200 Crescent Court, Suite 300
Dallas, Texas 75201


                            TERMINATION OF SUBLEASE
                            -----------------------


     THIS TERMINATION OF SUBLEASE is entered into effective as of the 31st day
of August, 2006 (the "Effective Date"), by and between ENRON WIND SYSTEMS, LLC,
                      --------------
a California limited liability company ("EWS"), and ZOND WINDSYSTEM PARTNERS,
                                         ---
LTD. SERIES 85-B, a California Limited Partnership ("ZWP 85-B" and, together
                                                     --------
with EWS, the "Parties").
               -------

                                    RECITALS

     A.   As of August 30, 1990, EWS (as successor in interest to Zond Systems,
Inc.) and ZWP 85-B entered into that certain Sublease (as amended, the
"Agreement"), a memorandum of which is recorded in Book 6539, Page 1433 of the
 ---------
Official Records of Kern County, California.

     B.   The Parties desire to terminate the Agreement.

                                   AGREEMENT

     1.   In consideration of the premises and covenants herein set forth, the
Parties hereby terminate the Agreement effective as of the Effective Date.

     2.   All of the covenants, terms and conditions set forth herein shall be
binding upon and shall inure to the benefit of the parties hereto and their
respective successors and assigns.






          EXECUTED as of the Effective Date.

                                          PARTIES:
                                          -------

                                          ENRON WIND SYSTEMS, LLC,
                                          a California limited liability company

                                          By:  Enron Wind LLC,
                                               its sole member

                                               By:   Enron Renewable Energy
                                                     Corp., its sole member




                                                     By: /s/ Jesse E. Neyman
                                                         -----------------------
                                                         Jesse E. Neyman,
                                                         President and Chief
                                                         Executive Officer



                                          ZOND WINDSYSTEM PARTNERS, LTD.
                                          SERIES 85-B, a California Limited
                                          Partnership

                                          By: Zond Windsystems Management IV
                                              LLC, its general partner


                                              By: /s/ Jesse E. Neyman
                                                  ------------------------------
                                                  Jesse E. Neyman, President


                                       2








                   ACKNOWLEDGMENT OF ENRON WIND SYSTEMS, LLC


THE STATE OF TEXAS         )
                           )  ss.
COUNTY OF HARRIS           )


         On September 7, 2006, before me, Rene Angelina Olvera, a Notary Public,
personally appeared Jesse E. Neyman, President and Chief Executive Officer of
Enron Renewable Energy Corp., the sole member of Enron Wind LLC, the sole member
of Enron Wind Systems, LLC, a California limited liability company, personally
known to me (or proved to me on the basis of satisfactory evidence) to be the
person whose name is subscribed to the within instrument and acknowledged to me
that he executed the same in his authorized capacity, and that by his signature
on the instrument the person, or the entity upon behalf of which the person
acted, executed the instrument.

         WITNESS my hand and official seal.





(SEAL)
RENE ANGELINA OLVERA
NOTARY PUBLIC, STATE OF TEXAS                /s/ Rene Angelina Olvera
MY COMMISSION EXPIRES                        -----------------------------------
MARCH 9, 2008                                Signature of Notary Public





                                       3






        ACKNOWLEDGMENT OF ZOND WINDSYSTEM PARTNERS, LTD. SERIES 85-B, A
                         CALIFORNIA LIMITED PARTNERSHIP


THE STATE OF TEXAS         )
                           )  ss.
COUNTY OF HARRIS           )


         On September 7, 2006, before me, Rene Angelina Olvera, a Notary Public,
personally appeared Jesse E. Neyman, President of Zond Windsystems Management IV
LLC, the general partner of Zond Windsystem Partners, Ltd. Series 85-B, a
California Limited Partnership, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person whose name is subscribed to the
within instrument and acknowledged to me that he executed the same in his
authorized capacity, and that by his signature on the instrument the person, or
the entity upon behalf of which the person acted, executed the instrument.

         WITNESS my hand and official seal.





(SEAL)
RENE ANGELINA OLVERA
NOTARY PUBLIC, STATE OF TEXAS                /s/ Rene Angelina Olvera
MY COMMISSION EXPIRES                        -----------------------------------
MARCH 9, 2008                                Signature of Notary Public




                                       4